mark kelly, the husband of gabby giffords who was shot in the head, six people died in the attack. the couple are gun owners themselves and used to practice at an nra range. now they are taking on the powerful gun lobby. kelly tells cnn they support extensive gun control, including restricting high-capacity weapons, like the one used by giffords' shooter. >> he was taken down after unloading ten rounds in a magazine, then there would certainly be other people that didn't -- that died that day that would be alive today. >> reporter: as the nra's executive director, wayne lapierre is the defender of gun rights. his prepared testimony released by the nra sounds familiar warnings. law-eye biding gun owners will not take responsibility for criminals nor do we believe the government should dictate what we can lawfully own. he will have avid defenders on the committee holding the hearing, like orrin hatch. >> well, after years of being pushed around, it's tough for them not to be combative. wayne lapierre is one of the nicest, kindest people you'll ever meet but he really does believe in